.Hello my name is***** look forward to assisting and am very sorry to hear that you are having this problem.It uses a Type H staple cartridge which you can get here:http://www.digitally.com/main/supplies/machine_id/103084/Ricoh+Aficio+MP+7502SP+Copier+Toner+Drum.htmlThe finisher uses Type K staples which you can get here:http://www.precisionroller.com/staples-for-ricoh-sr4070/details_26354.htmlYou can sometimes find both cheaper on eBay and Amazon.If this did not work please come back and let me know by clicking on reply to expert so we can continue.If it did work please don’t forget to leave a positive rating it is greatly appreciated..